Why is my new home button doesn't react after 30 sec?

Hai everyone,

I have a problem.

I replaced a home button from a IPhone 6s

I know that the Touch ID is gonna away, but that is fine and acceptable.

Strange is..

When I use the iPhone, the new home button works perfectly. But if i lock the iPhone for about 30 seconds, the new home button doesn't react. If is use the power button to use the iPhone, then the home does work.

How is this possible ??

What's going on?

I hope it is clear what my problem is.